Overview
The TLC555CDG4 is a monolithic timing circuit fabricated using Texas Instruments' LinCMOS™ technology. This device is fully compatible with CMOS, TTL, and MOS logic and operates at frequencies up to 2 MHz. It is designed for general-purpose timing applications and is functionally interchangeable with the NE555, sharing the same pinout. The TLC555CDG4 offers low power consumption across the full range of power-supply voltage and supports smaller timing capacitors than the NE555 or LM555, resulting in more accurate time delays and oscillations.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VDD) | - | 2 | - | 15 | V |
| Trigger Voltage (VIT) | 25°C | 2.8 | 3.3 | 3.8 | V |
| Threshold Voltage (VIT) | 25°C | 9.45 | 10 | 10.55 | V (at VDD=15V) |
| Low-Level Output Voltage (VOL) | IOL = 1 mA, 25°C | 0.07 | - | 0.3 | V |
| Supply Current (IDD) | 25°C | 250 | - | 350 | µA |
| Power Dissipation Capacitance (CPD) | 25°C | 80 | - | - | pF |
| Output Current (IOH/IOL) | IOL = 1 mA, 25°C | - | - | 8 mA | mA |
| Operating Temperature Range | - | 0°C to 70°C (TLC555C) | - | -40°C to +85°C (TLC555I) | °C |
Key Features
- Low power consumption: Typically 1 mW at VDD = 5V.
- High input impedance: Allows the use of smaller timing capacitors for more accurate time delays and oscillations.
- CMOS output: Capable of swinging rail to rail.
- High output current capability: Supports up to 8 mA output current.
- ESD protection: Exceeds 2000 V per MIL-STD-883C, Method 3015.2.
- Available in various packages: SOIC, PDIP, SOP, TSSOP, and others.
- Functionally interchangeable with the NE555: Same pinout and similar functionality.
Applications
- Precision timing
- Pulse generation
- Sequential timing
- Time delay generation
- Pulse width modulation
- Pulse position modulation
- Linear ramp generator
- Automotive applications: High-reliability automotive configurations.
Q & A
- What is the TLC555CDG4?
The TLC555CDG4 is a monolithic timing circuit fabricated using Texas Instruments' LinCMOS™ technology, designed for general-purpose timing applications.
- What are the key differences between the TLC555 and the NE555?
The TLC555 has higher input impedance, allowing for smaller timing capacitors, and lower power consumption compared to the NE555. However, it is functionally interchangeable with the NE555.
- What is the operating frequency range of the TLC555CDG4?
The TLC555CDG4 operates at frequencies up to 2 MHz.
- What are the typical supply current values for the TLC555CDG4?
The supply current is typically 250 µA at 25°C and up to 500 µA over the full temperature range.
- What is the ESD protection level of the TLC555CDG4?
The ESD protection exceeds 2000 V per MIL-STD-883C, Method 3015.2.
- In what packages is the TLC555CDG4 available?
The TLC555CDG4 is available in SOIC, PDIP, SOP, TSSOP, and other packages.
- What are the typical applications of the TLC555CDG4?
Applications include precision timing, pulse generation, sequential timing, time delay generation, pulse width modulation, pulse position modulation, and linear ramp generation.
- Can the TLC555CDG4 be used in automotive applications?
- How does the trigger level and threshold level work in the TLC555CDG4?
The trigger level is approximately one-third of the supply voltage, and the threshold level is approximately two-thirds of the supply voltage. These levels can be altered using the control voltage terminal (CONT).
- What is the significance of the reset input in the TLC555CDG4?
The reset input can override all other inputs and is used to initiate a new timing cycle. If RESET is low, the flip-flop is reset, and the output is low.
